Model
Tcl T05WV9M
Rank #5 means 4 of the 404 room air conditioner models we track cost less to run each year; the 97th efficiency percentile means it uses less energy for its size than 97% of those models.
What does the Tcl T05WV9M cost to run per year?
Few room air conditioner models we track undercut the Tcl T05WV9M on cost; at about $51 a year it holds rank #5 of 404. It uses 25% less energy than the U.S. federal standard model in its class, which would cost about $68/yr to run, a saving of roughly $17 a year. Normalized for capacity, it ranks ahead of 97% of room air conditioner models we track on efficiency, an exceptional showing for the class. Its CEER of 13.7 reflects combined energy efficiency ratio, one of the class's core efficiency levers.
On the leaderboard, the Tcl T05WV9MB at $51/yr runs a little more, the closest neighbor to its exact spot in the ranking. A room air conditioner typically stays in service for somewhere around 10 years; over that span, the Tcl T05WV9M's $51/yr adds up to roughly $510 in electricity alone, before purchase price or repairs.
Also sold as: Tcl W5WC72.
By the numbers
The Tcl T05WV9M normalized against its whole class, so each figure means something.
What it costs you over time
Running cost is an every-year number, so it compounds. At $51/yr, here is what the Tcl T05WV9M adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the Tcl T05WV9M costs about $510. That is roughly $170 less than a standard model in its class, which would run closer to $680 over the same ten years.
How the Tcl T05WV9M compares
The room air conditioner class we track runs from $51 to $389 a year. At $51/yr, it runs about $48 a year cheaper than the class median of $99, and it is the cheapest room air conditioner to run in the class among the models we track. Against the US federal standard model for its class at about $68/yr, the Tcl T05WV9M uses 25% less energy.
What drives its running cost
At 5000 BTU/hr, the Tcl T05WV9M is a small room air conditioner for its class, which spans 5000 to 34100 BTU/hr with a median of 10100 BTU/hr, at the small end of the class, capacity itself is doing a lot of the work to keep that figure down, separate from how efficient the unit actually is. Beyond size, its CEER of 13.7, below the class median of 15, is the class's own efficiency yardstick, combined energy efficiency ratio, and it is what separates two similarly sized models with different running costs.
- Combined Energy Efficiency Ratio (CEER). CEER captures cooling output per watt, including standby power; a higher CEER means less electricity for the same BTU of cooling.
- BTU cooling capacity. A higher-BTU unit is sized for a bigger room and generally uses more electricity per hour of operation than a smaller unit, regardless of efficiency.
- Thermostat and mode usage. Running on a fixed low temperature around the clock uses far more energy than using a thermostat setting, eco mode, or a timer to match cooling to when the room is actually occupied.
Common questions
Is the Tcl T05WV9M cheap to run?
Yes, relatively. At $51 a year it ranks #5 of 404 room air conditioner models we track, in the cheaper part of its class to run.
How much does the Tcl T05WV9M cost per month?
Roughly $4.23/mo, spreading the $51/yr estimate evenly across twelve months at $0.1856/kWh. Actual monthly bills swing with your rate and usage pattern.
How is this running-cost figure calculated?
We take the model's published annual energy use of 274 kWh from ENERGY STAR and multiply it by the US average residential electricity rate of $0.1856/kWh, giving about $51 a year. It is an electricity-only estimate and does not include purchase price, water, or installation.
How efficient is the Tcl T05WV9M for its size?
97th percentile once size is factored in. That means its size-adjusted efficiency is a real factor in the running-cost figure above; its capacity plays a large role too.
Cheaper to run in the same class
This is already the cheapest model to run in its class among the ones we track.
Source
ES_1126578_T05WV9M_11122025105736_80268586View certified room air conditioner listingsENERGY STAR data as of July 2026Tcl and T05WV9M are used here for identification only and are not endorsements. Figures are computed by WattWise Labs from public ENERGY STAR data, not measured in our own lab.